01 - Preheat oven to 350°F. Line a 9x13 inch baking pan with parchment paper, allowing overhang for easy removal.
02 - Cream softened butter and 1/2 cup sugar in a large bowl until light and fluffy. Blend in 2 cups flour and 1/4 teaspoon salt, mixing just until dough forms.
03 - Press dough evenly into prepared pan bottom. Bake for 18 to 20 minutes until lightly golden.
04 - Whisk sugar and flour in a medium bowl. Add eggs, lemon juice, and lemon zest, whisking until thoroughly combined.
05 - Pour lemon mixture over hot crust immediately after removing from oven. Bake for another 18 to 20 minutes until filling is set in center.
06 - Let cool completely in pan. Lift out using parchment handles and cut into 16 bars. Dust generously with powdered sugar before serving.